These Miniature Cobaltima® very fine pointed tweezers are made of a cobalt alloy, which is extremely hard, temperature resistant to 932°F (500°C), anti-magnetic and corrosion resistant. The body is .04" (1mm) in thickness for light pressure use. The tips are radius which eliminates marring and scratching of delicate parts and wires. These miniature tweezers are ideal for working under a microscope.